Pulverizing-mill.



Patented Feb. I902.

C. WALLACE. PULVEBIZING MILL.

(Application fild Mar. 15, 1901.

Sheet.

2 Sheets- (No Model.)

' INVENTOR. Char/es [MW/ace.

0. WALLACE.

PULVERIZING MILL.

(Application filed Mar. 15, 1901.)

(No Model.) 2 Sheets-$heet 2.

SW/T E5 INVENTOR.

k M I Char/es HJ/acc Patented Feb. I902.

UNITED STATES PATENT OFFICE.

onARLEs WALLACE, OF DENVER, COLORADO, ASSIGNOR TO THE NEW ERA MACHINERYCOMPANY, OE DENVER, COLORADO.

PULV ERlZlNG-IVHLL.

SPECIFICATION forming part of Letters Patent No. 693,089, dated February 11, 1902.

Application filed March 15, 1901. Serial No. 61,406. (No model-l I i marked thereon, which form a part of this' specification.

My invention relates to improvements in .pulverizingmills, my object being to provide an apparatus of this class which shall be comparatively simple in construction, economical in cost, reliable, durable, and efficient in use; and to these ends the invention consists of the features,arrangemen ts,and combinations hereinafter described and claimed, all of which will be fully understood by reference to the accompanying drawings, in which is illustrated an embodiment thereof.

In the drawings, Figure 1 is a section taken on the line w an, Fig. 2, the stamp-holder or yoke and the stamps being shown in front elevation. Fig. 2. is a section taken on the line y y, Fig.1, the yoke and stamps being shown in end elevation. Fig. 3 is a section taken through the hollow journal of the yoke, illustrating an adjustable pin forengaging a recess of the stamp and supporting it out of contact with the die. Fig. 4 is an end view of the cam-disk mounted on the journal and in which the locking-pin turns. Fig. 5 is a perspective view of the yoke or stamp-holder.

Fig. 6' is a section taken through one of the stamps shown in detail. Fig. 7 is a side elevation of my improved mill.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate a suitable casing or mortar which is semicircular in longitudinal section and gradually increases in thickness from the top toward the bottom,

since the power exerted by the stamps or pul-" verizing-blocks is greater at the bottom of the mortar and diminishes toward the top. In this mortar-box or casing are located three dies 6, which are semicircular to conform to the shape of the mortar. Each of these dies is for convenience formed in three parts. The bottom ofthe mortar is provided with beveled flanges 6, located outside of the pulverizing area of the stamps. In the side walls of the mortar, which are provided with Openings for the purpose, are located screens 8 of suitable mesh, through which the pulverized 6o material passes in the form of .pulp when it has been reduced to the required mesh. Outside of each screen is located a downwardlyinclined flange 9,Which directs the pulverized material into-a trough 10 below. 5

Mounted to rotate in the mortar-casing is a yoke or stamp-holder 12, provided with shaft extensions or journal's'l3, which engage boxes 14. In this yoke or holder are formed three rectangular openings 12 whose axes form suitable angles with each other and in which are respectively located the stamps or pulverizing-blocks 15, which slide in the yoke by gravity as the latter is rotated. By virtue of the arrangement of the yoke-openings in which the stamps slide the latter drop suc-' cessively to engagement with the dies in the performance of their pulverizing function. The mortar is closed at the top by a detachable housing 16, provided at one side with a feed-hopper 17, through which the material to be pulverized is fed into the mortar.

To one of the shaft extremities of the yoke is attached a pulley 18, which may be connected with any suitable power for operating the yoke. As the latter is rotated the stamps drop successively intothe mortar when the yoke is turned sufficiently to allow the stamp to slide through the yoke in a vertical or approximately vertical position. After the drop the stamp, as the yoke continues to turn,performsa grinding function as it moves upwardly to the top of the die. The other stamps drop successively through their Openings in the yoke upon the material in the 5 mortarand repeat the action of the first stamp, as explained. After each has acted on the material in the mortar it projects upwardly into the mortar-honsing'until the yoke has turned sufiiciently to allow it to drop, as aforesaid. By virtue of theconstruction of my improved mill it becomes practicable for the position.

- stamp 15 is preferably'provided with two steel low to receive movable pins 18, each of which is adapted to enterace'nt'ral recess 15, formed in the adjacent stamp, whereby the latter may be supported out of contact with its mortardie when the stamps are not in use, thus .giving access to the mortar without the interference of the stamps. Each of these pins,.as shown in the drawings, is surrounded by a coil-spring 19, one extremity of which engages a stop 18, formed integral with the'pin and engaging a shoulder on the journal,while the other extremityof the spring bears against a disk22, mounted on the shaft extremity or journal 13. To the exposed extremity of the pin 18 is made fast a small crank 21; The pin is adapted to be held out of contact with the stamp by means of a cam 22, formed on the disk and provided with a recess 22,adapted to receive and lock the crank in the adjusted As the crank is'tn'rned in either direction it moves up the inclined face of the cam and engages the said recess. During this operation the pin is withdrawn from the stamp, leaving the latter free to operate.

' The pin is locked in this position until it is desired to again. utilize it for the purpose stated.

The yoke is provided with projections 12, extending outwardly from each opening and These guides are bolted to the yoke, as 'shown in the drawings. They may of course be secured in any other suitable manner.

As shown in the drawings, (see Fig. 6,) each shoes 15, one being located at each extremity; Each of these shoes has a reducedinner extremity adapted to enter a. counterpart socket formed in the body of the stamp,which,

as shown in the drawings, consists of a solid piece of metal polygonal in cross section. The shoes are locked in place by pins 15 These, shoes are readily detachable to the end that they may be removed when worn and new ones substituted.

Attention is called to the fact that no provision need be made for hanging orsupporting the middle stamp above the pulverizing-face of the die, since by turning the yoke to bring the middle stamp to the horizontal position the saidstamp will be supported above the pulverizing-face of the mortar.

Having thus described my invention ,what I claim is- 1. In a pulverizing-mill the combination with a suitable mortar or casing, of a rotary stamp-holder,stamps slidably mounted therein, and means mounted on the stamp-holder for supporting a stamp above the pulverizingbed of the mortar.

2. In a pulverizing-mill the combination with a suitable mortar or casing, of a prism shaped rotary yoke jonrnaled therein and provided with openings, stamps located in said openings in which they are normally adapted to slide, and means mounted on a journal of the yoke for locking a stamp against movement. y

3. In a pulvrizing-mill the combination with a suitable mortar or casing, of a rotary prism-shaped yoke or stamp-holder, provided with openings and having hollow journals, whose openings communicate with the adjacent stamp-openings of the yoke, stamps located in said openings in which they are normally adapted to slide, each stamp adjacent the journal having a recess, and a pin located in the opening of eachjournal and adapted to enter the recess of the adjacent stamp whereby the latter is locked from sliding movement.

, In testimony whereof I'afiix my signature in presence of two witnesses.

CHARLES WALLACE. Witnesses:

BRADFORD M. CARR, DORA O. SHIOK. 

